Levator anguli oris

Levator anguli oris (also known as the Caninus) is a facial muscle that helps in the elevation of the angle of the mouth. It is a part of the Muscles of facial expression and plays a significant role in human facial expressions, particularly smiling.

Anatomy

Levator anguli oris shown in red.

The Levator anguli oris originates from the canine fossa, just below the infraorbital margin of the Maxilla. It inserts into the angle of the mouth, blending with the muscles at this location, particularly the Orbicularis oris and Zygomaticus major.

Function

The primary function of the Levator anguli oris is to elevate the angle of the mouth, contributing to facial expressions such as smiling. It works in conjunction with other muscles of facial expression to create complex facial movements.

Clinical significance

Damage to the Levator anguli oris, such as through trauma or neurological conditions, can result in an inability to elevate the corner of the mouth on the affected side. This can lead to an asymmetrical smile or difficulty with facial expressions.

See also

• Facial muscles
• Facial expressions
• Muscles of mastication